Universal gauge



Nov. 4,7'1941. A, POPPE UNIVERSAL l GAUGE Filed Oct. 24, 1959 FIG. 1

R 0% o o mw VP m 0|/ :DL R .w A

0 6/ G. n. y* \L 3 ,B.

TTORNEY.

Patented Nov. 4, 1941 UNITED STATESA PATENT OFFICE 2,261,777 UNIVERSAL'GAUGE v Alfred Poppe, Rochester, N. Y. Application october 24, 1939,seria1N0.301,005

i (o1. azi-'174) 7 claims.

The object of this invention is to provide a universal gauge forcalipering the length of certain portions of screw machine parts whichhave tw or more diameters.

This and other objects of the invention will be illustrated in thedrawing, described in the specication, and pointed out in the claims atthe end thereof.

In the drawing:

Figure 1 is a top plan view of the gauge.

Figure 2 is an end elevation of the gauge looking at it from the rightin Figure l.

Figure 3 is a view of the gauge laid on its side.

Figure 4 is a sectional view, the section being taken on the lineIIx-4:1: of Figure 1.

Figure 5 is a section on the line 5.7:--5zc of Fig- I ure 1.

Figure 6 is a section on the line Brr-6a: of Figure 1.

Figures 7, 8 and 9 are detail views of spacing collars.

Figure 10 is a detail view of the guide plate.

In the drawing like reference numerals indicate like parts.

In the drawing reference numerals I and 2 represent the two jaws of thegauge; the jaw I is movable and the jaw 2 is stationary. Riveted to thejaw2 is the guide plate 3. The jaw 2 is preferably formed of two platesmarked 2a and 2b. These jaws are riveted together by the rivets 4, 4which pass through the guide plate 3 andihold the guide plate firmly onthe jaw. The jaw I is also formed of two plates marked Ia and Ib inFigure 5, and these plates are cut away to form a slot 5 through whichthe guide plate 3 extends so that the jaw I can slide thereon. 'I'heguide plate is cut away as indicated at 6 with a wide, rectangularopening to receive the head 1 of the screw 8, and it is also cut awaywith a narrower rectangular opening indicated at 9 to receive thethreaded part of the screw. The screw ts in this opening so that it canturn freely but can not move endwise. end thereof that engages with apivot 3a formed on the guide plate. The two parts Ia and Ib of the jaw Iare fastened together by rivets and are threaded to receive the screw 8.The screw is placed in the guide plate, and the guide plate is insertedin the slot 5, and the screw is turned into threaded engagement with thejaw I. When the jaw I, the guide plate 3, and the screws 'I and 8 areassembled in this way, it is ready for assembly with the stationary jaw2 and the stud I0. The stud I shown in Figure 4 has a reduced end Ilwhich is riveted in an opening provided in the The head 1 has a recessinthe guide plate, 3. 'Ihe two parts of the stationary jaw 2 arefastened together at the ends by rivets, and the end of the guide plateis inserted in the rectangular slot shown in Figure 6 and the rivets 4,4 are passed through the two parts of thev jaw and the guide plate andriveted in place. With this assembly the two parts of the jaw can bebrought together, or drawn apart, by turning the head I of the screw. e

The part Ia of the moving jaw I is cut away as indicated at I Ia to forma recess that receives the end of the stud I0, when the jaw I is broughtagainst the jaw 2.

A spacing sleeve I2 is provided which encircles the stud III. Thissleeve has a reduced end I3. The reduced end I3 extends into the recessIIa of the moving jaw. This permits the moving jaw to close up to thestationary jaw.

On the stud I0 is placed a swinging plate I4 having an upturned end I5forming a bracket thereon. This upturned end is adapted to rest againstthe two jaws when the paws are either open or closed or inintermediateposition. On the stud I0 is then placed the collar I6 and ontop of this collar is then placed the swinging plate I'I, having anupturned end I8 which forms a bracket thereon and which is adapted torest against the two jaws as shown in Figure 3. On the stud II) is thenplaced the spacing collar I9, and on this is then placed the base plate20 hav-v ing legs 2l, 2I thereon by which the gauge may be supported ona table.

p Upturned from the right hand end of the base plate 20 is the bracket22 which rests against the jaws when the jaws are either open or closedor in an intermediate position. The stud I0 passes through round holesin the swinging plates I4 and Il and passes through an elongated slot 23in the base plate 20. This permits the :adjustment of the base plate 20laterally with reference to the stud.-

- The studlll has a threaded end shown in Figure 4 on which the knurlednut 24 engages and `by which the parts are all clamped together. It willalso be understood that the base plate 20 can extend parallel to thejaws I and 2 or can be placed at right angles thereto when the use ofthe gauge requires such a position.

As shown in Figure 1, the jaws of the gauge are cut away with holesindicated at 30, 3|, 32, 33 and 34. yThe jaws can be brought together indirect abutment with each other and in such case the width of theopening 34 will be alf. The width of the second opening will be 11g, thewidth of the third opening will be 1/8", the width of the fourth openingwill be 1A, and the width of the fifth or largest opening will be 1/2".

The jaws can be moved apart by turning the head 1. They can be moved toposition so that the width across the rst opening between the jaws willbe g", in which case the recesses in the jaws will form parts of amutilated curve having a diameter of 1 2. The jaws can then be movedfurther apart, so that the width across the second opening will be 1/8",in which case the recesses in the jaws will form parts of a mutilatedcircle having a diameter of lAg". The jaws can then be moved furtherapart so that the recesses of the third opening will form parts of amutilated circle having a diameter of 1A". The jaws can then be movedfurther apart, so that the width across the fourth opening in thejawswill form parts of a mutilated circle having a diam` eter of a half aninch. The jaws can then be moved still further apart until the recessesof the fifth opening will form parts of a mutilated circle having adiameter of one inch. These various positions of the jaws are marked onthe guide plate 3.

It will also be understood that the jaws may be stopped in anyintermediate position, the purpose of the series of openings being toclamp between the jaws the round portion of .some screw machine part,the length of which round portion is to be measured.

It will also be understood that the jaws I and 2 when assembled willhave a uniform thickness throughout the length and breadth thereof,which thickness will preferably be because that is a unit which iseasily added or subtracted in making the measurements with the gauge.

It will also be understood that when the jaws I and 2 are assembled withthe spacing screw I2 and swinging plate I4, the distance between the`top of the jaw and the bottom of the plate I4 is preferably .650", andwhen the jaws are assembled with the swinging plate I'I, the distancebetween the top of the jaws and the bottom of the swinging plate I'I isone inch, and when the jaws are assembled with the base plate thedistance between the top of the jaws and the bottom of the base plate 2Dwill be 1.5.

It will also be understood that the swinging plates I4, I'I and 20 maybe of any suitable thickness, and for this purpose we will assume thatthey are each of a thickness of .05 and therefore the distance betweenthe top of the jaws and the top of the plate I4 will be .06, and thedistance between the top of the jaws and the top of the plate II will be.95, and the distance between the top of the jaws and the top of theplate 2U will be 1.45.

In using the gauge the round portion of some screw machine part isinserted in the appropriate hole between the two jaws, and the jaws arethen brought together around it, so that the head or the shoulder of thescrew machine part rests directly on the jaw, assuming that the balanceof the screw machine part does not extend below the jaws. A micrometercaliper is then applied with one jaw of the caliper under the jaws ofthe gauge, and the moving part of the micrometer caliper is then broughtinto contact with the upper end of the screw machine part, and themeasurement of the span is taken. From this is deducted the thickness ofthe jaws, and the difference between the two elements will .give thelength of that portion of the screw machine part above the jaws to whichthe micrometer caliper could not be applied directly.

If the screw machine part extends below the jaws, then one or the otherof the plates I4, I1, or 20 must be used, depending upon the length ofthe part that extends below the jaws, as will now be explained.

If that portion of the screw machine part that extends from the top ofthe jaws down is less than .6 long, then the swinging plate I4 would beswung under the screw machine part, and the measurement would be madefrom the bottom of the plate I4 to the top of the screw machine partabove the jaws, and from this measurement .65" would be deducted and thedifference would be the correct length of the portion above the jaws.

If the length of thescrew machine part pro- ,jecting below the top ofthe jaws is less than .95 long, then the swinging plate II will be used.

If the length of the screw machine part projecting below the top of thejaws is not more than 1.45" long, then the swinging plate 20 will beused.

In each case the swinging plate will be placed directly under the screwmachine part that is clamped between the jaws. "The micrometer caliperis then applied with its lower jaw under the plate selected, andthescrew of the micrometer is adjusted to the top of the screw machinepart projecting above the jaws. This measurement is then read, and fromthis measurement .65 is deducted if the plate I4 is used, `one inch isdeducted if the plate I'I is used, and 1.5 is deducted if plate 2U isused, and the difference `between these elements will-'be the length ofthe screw machine part projecting above the jaw.

The word clamp or clamped is used in the specification and claimsadvsedly, it being understood that the part to be measured must be heldbut must not be held so tight as to disturb its alignment for thepurpose of making the measurement accurately, and in this sense the wordis used in the specification and claims.

I claim: i

1. A gauge to be used in measuring the length of a certain portion ofany screw machine product, which'comprises two jaws, means for movingthe jaws toward and from each other, means for clamping the screwmachine product between the jaws with the length of the portion to bemeasured' projecting above the top surface of the jaws, means forproviding a xed bottom surface in the gauge placed at a distance belowthe top surface of the gauge greater than the length of the portioncontained below the top of the jaws, the distance between the top of thegauge and the bottom fixed surface being a constant, the screw machineproduct being so held in the gauge that the distance between the top ofthe screw machine product projecting above the jaws and the xed bottomsurface below the jaws can be accurately measured, which distance lessthe constant will give the lengthl of the portion above the jaws, towhich partV the micrometer cannot be applied directly.

2. A gauge to be used in measuring the length of a certain portion ofanyscrew machine product, which comprises two jaws movable toward andfrom each other with the length of the portionto be measured projectingabove the top surface of the jaws, aguide plate fastened in one of thejaws on which the other jaw is adapted to move back and forth, a studriveted in said guide plate, a plate mounted to swing on said 1 stud,said plate having a bottom surface which is held at a distance from thetop of the jaws which is constant, said jaws being adapted to receive ascrew machine product clamped between them with a portion thereofprojecting above the jaws, the length of which portion is to bemeasured, said gauge permitting a measurement to be made of the distancebetween the bottom of the plate and the top of the screw machineproduct, which distance less the constant equals the length of thatportion ofthe screw machine product to be measured.

3. A gauge to be used in measuring the length of a certain portion ofany screw machine product, which comprises two jaws movable toward andfrom each other with the length of the portion to be measured projectingabove the top surface of the jaws, a guide plate fastened in one of thejaws on which the other jaw is adapted to move back and forth, a studriveted in said guide plate, a plate mounted to swing on said stud, saidplate having a bottom surface which is held at a constant distance fromthe top of the jaws, said jaws being adapted to receive a screw machineproduct clamped between them with a portion thereof projecting above thejaws and a portion projecting below the jaws, the length of whichportion projecting above the jaws is to be measured, said gaugepermitting a measurement to be made of the distance between the bottomof the plate and the top of the screw machine product, which distanceless the constant equals the length of that portion of the screw machineproduct above the jaws.

4. A gauge adapted to be used in measuring the length of a certainportion of a screw machine product, said gauge having a part having adimension that is constant and having a recess in said part in which thelength of a portion of a screw machine product not to be measured isclamped, means for clamping it therein, the other portion of the screwmachine product projecting above the gauge, the gauge and screw machineproduct being so assembled that the length of the assembly can bemeasured by a micrometer, the length of the projecting portion of thescrew machine product being the total length of the assembly less thelength of the constant.

5. A gauge to be used in measuring the length of a certain portion ofany screw machine product, which comprises two jaws movable toward andfrom each other, between which the product is held with the length ofthe portion to be measured projecting above the top surface of the jaws,a guide plate fastened in one of the jaws on which the other jaw isadapted to be moved back and forth, said guide plate being slotted, anadjusting screw mounted to rotate in said slot, said screw engaging withthe movable jaw for the purpose of adjusting it to clamp the screwmachine product in position for measurement.

6. A gauge adapted to be used in measuring the length of a certainportion of a screw machine produot, said gauge having parts formed witha recess therein in which the portion of the screw machine product thelength of which is not to be measured is held, the length of that partof the gauge being a constant, the other portion of the screw machineproduct the length of which is to be measured projecting from said partsand forming an assembly therewith, the length of said assembly beingcapable of measurement by a micrometer, the length of the projectingportion of the screw machine product being the total length of theassembly less the length of the constant,

7. A gauge to be used in measuring the length of a certain portion ofany screw machine product, said gauge comprising means for clamping thescrew machine product in position with a portion projecting from saidmeans, the length of which portion is to be measured, and meansassociated with said clamping means for-ming a measuring constant, saidmeans including a measuring surface situated at a point remote from theprojecting end of the product and a second positioning surface situatedintermediate the ends of the product, the screw machine product being soheld in the gauge that the distance between the top of the screw machineproduct projecting above the clamping means and the measuring surfaceremote therefrom can be accurately measured by a micrometer, whichdistance less the constant will give the length of the portion above thejaws, which portion cannot be measured separately with a micrometer.

ALFRED POPPE.

